Postmarked 1910; Detroit River Channel modifications at the Lime Kiln Crossing area date back to 1874; by 1906 it was decided that the full capacity of the channel had not been realized, and the River and Harbor Act of March 2, 1907 approved construction of the Livingstone Channel for southbound freighter traffic west of the Amherstburg Channel; the new channel would be created west of Bois Blanc (Bob-lo) Island; to facilitate removal of bedrock from the Lime Kiln Crossing area, a 1,768 metre long cofferdam - the largest in the world - was constructed to allow dry excavation (from Construction of Shipping Channels in the Detroit River, U.S.G.S., 2011); the postcard is addressed to Mrs. Oyouma Russell.